Doctor Who Series 9 Episode 7 The Zygon Invasion Trailer Released

CB: BBC has released the first trailer for next Saturday's episode of Doctor Who: "The Zygon Invasion."

The Zygons, a race of shapeshifting aliens, have been living in secret amongst us on Earth, unknown and unseen - until now! When Osgood is kidnapped by a rogue gang of Zygons, the Doctor, Clara and Unit must scatter across the world in a bid to set her free. But will they reach her in time, and can they stop an uprising before it is too late?